I really enjoyed this. I never read the book, I plan to do so soon, but going in blank like that probaby helped some too.
Other than Pfeiffer being the main person and the actress, I didn't think any of it was obvious. Yes by the time he was in the tunnel with all of them, it became clear that it was a team effort. I"m glad they mostly got known names for the parts so it kept it more of a mystery. Usually when you see a known actress or actor you can figure out why they are there, so having more than a couple helped with that if they didn't know going in.
Branagh was great, as was the character. I can't think of anyone that gave a bad performance. Very good cast that all played their roles well.
The reveal and ending was pretty amazing and glad to see they went that way
The mustache sleeping guard got everyone laughing
Overall, at least a B+